The 20W solar street light can be roughly divided into a solar street light and integrated solar street light according to the volume size. The 20W solar street light stands out as a whole. Its main accessories include light holder, light pole, solar panel, embedded parts, lithium battery (lead battery is used in some areas). The integrated solar street light is divided into solar integrated machines and split solar street light. The accessories of the integrated solar energy machine include light holders (including solar panel, lithium battery and light source) and light pole (mainly including wall suction arm and hoop arm). The light head (including lithium battery and light source), solar panel, light pole (mainly including wall suction arm and hoop arm) and lithium battery (some lithium batteries of the split machine are independent).

In terms of 20W solar street light heat dissipation, attention should be paid to the seasonal problems in summer and winter. Due to the high surface temperature in summer, there are heat dissipation problems in the light cap and lead battery of solar energy street light, and there are no heat dissipation problems in the light pole and solar panel. The heat dissipation effect of the light cap is also very different according to the shape of the light cap. For example, At present, Jindou's light head has a low cost. It uses some aluminum materials as a whole. The mainboard of the light source inside the light head is also an aluminum base plate. The overall heat dissipation effect is average, but because the light source does not generate electricity in the daytime, it will not be damaged in summer or winter due to the bad heat dissipation of the light head caused by the weather. The transformer light head has a high cost in the light head It adopts die-casting aluminum technology. The overall material and shape effect of the light head is good, and the heat dissipation effect of die-casting aluminum material is very good. Even if the light is on in the daytime, the temperature around the light source will occur and the light source will be burnt out. The lead-acid battery is buried under the ground. Due to the low temperature in summer and winter, there will be no too large temperature difference, so there will be no problem of poor heat dissipation. The non-human construction will not damage the lead-acid battery.

The components of the integrated solar street light and the split solar street light are mainly light caps and lithium batteries. Due to their low overall cost, most of them use Jindou light caps. The solar energy lights are lit at night and will not cause damage to the light source or circuit due to heat dissipation problems. The lithium batteries are generally fixed on the back of the solar panel, and the lithium batteries will not be directly damaged due to the problem of the orientation of the solar panel Sunlight, so the surface of lithium battery will not be too hot to protect the internal lithium battery and controller. Besides, the internal lithium battery is equipped with a protection plate. Once there is a problem, the power will be cut off for the first time, and the components will not be damaged.